Granted Patent
Utility
US 4,444,990 · App. 06/416,055
Heat sensing device
Inventor:
Luis F. Villar
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Sep 8, 1982
Inventor
Luis F. Villar
Assignee (at issue)
Servo Corporation of America
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.